rust fmt and some cleaning

db/hotel_schema.sql

@@ -1,51 +0,0 @@
-CREATE TABLE rooms (
-    id      INTEGER PRIMARY KEY AUTOINCREMENT,
-    number  TEXT NOT NULL UNIQUE,
-    status  TEXT NOT NULL DEFAULT 'clean'
-);
-
-CREATE TABLE IF NOT EXISTS "conversation" (
-    `id` INTEGER PRIMARY KEY AUTOINCREMENT UNIQUE NOT NULL,
-    `creator_id` INTEGER,
-    `title` TEXT,
-    `created_at` TEXT DEFAULT (CURRENT_TIMESTAMP)
-);
-
-CREATE TABLE IF NOT EXISTS "message" (
-    `id` INTEGER PRIMARY KEY AUTOINCREMENT,
-    `conversation_id` INTEGER REFERENCES `conversation`(`id`),
-    `sender_id` INTEGER NOT NULL, `content` TEXT NOT NULL,
-    `sent_at` TEXT DEFAULT (CURRENT_TIMESTAMP)
-);
-
-CREATE TABLE "conversation_participants" (
-    `conversation_id` INTEGER NOT NULL REFERENCES `conversation`(`id`),
-    `user_id` INTEGER NOT NULL,
-    `joined_at` TEXT DEFAULT (CURRENT_TIMESTAMP)
-    PRIMARY KEY (conversation_id, user_id)
-);
-
-CREATE TABLE IF NOT EXISTS "inventory" (
-    `id` INTEGER PRIMARY KEY AUTOINCREMENT,
-    `amount` INTEGER,
-    `item_name` TEXT,
-    `user_id` INT,
-    `updated_at` TEXT DEFAULT (CURRENT_TIMESTAMP)
-    );
-
-CREATE TABLE IF NOT EXISTS "room_history" (
-    `id` INTEGER PRIMARY KEY AUTOINCREMENT,
-    `room_id` INTEGER NOT NULL REFERENCES `rooms`(`id`),
-    `room_number` TEXT NOT NULL,
-    `status` TEXT,
-    `updated_at` TEXT DEFAULT CURRENT_TIMESTAMP
-);
-
-CREATE TABLE IF NOT EXISTS "inventory_history" (
-    `id` INTEGER PRIMARY KEY AUTOINCREMENT UNIQUE NOT NULL,
-    `item_id` INTEGER NOT NULL REFERENCES `inventory`(`id`),
-    `amount` INTEGER NOT NULL,
-    `item_name` TEXT,
-    `user_id` INT,
-    `updated_at` TEXT DEFAULT (CURRENT_TIMESTAMP));
-